Daniel mcbride graham



(N0 Modl.)

D. MGRAHAM.

V V STEAM GENERATOR.

No. 295,542. Patented Mar. 25,1884.

N. PETERS. PhQwLiihognphor. wnilingfom B4 c.

7 UNITED STATES PAT T Orricn.

COMPANY OF V-ULOAN,

OF NEW YORK, N. Y.

ST AM-GENERATOR.

SPECIFICATIONforming part of Letters Patent No. 295,542, dated March 25,18814.

Application filed May 29, 1883. (No model.)

To (ZZZ whom, it may concern:

Be it known that I, DANIEL MQBRIDE GRA- HAM, of Chicago, in the countyof Cook, of the State of Illinois, have invented anew and usefulImprovement in Steam-Generators; and

I do hereby declare the same to be described in the followingspecification and represented in the accompanying drawing, which is anelevation of a generator of my improved kind, except in having its outercasing or duplex airincluction jacket shown in vertical section.

The nature of my intention is defined in the claims hereinafterpresented.

In the said drawing, A denotes the waterinduction pipe, which, afterentering the case B at its lower part and projecting thereinhorizontally, as shown, is extended up ward vertically therein, andopens into a tubular coil or spirally-wound pipe, 0. \Vithin the saidcoil concentrically is a drum, D, with or into which at its lower endthe coil communicates or opens.

Surrounding the coil 0, and extending below it, is another such coil, E,which opens out of the drum D at the top thereof. At its lower part thecoil E communicates with. another such coil, F, arranged below the coilE, and opening at its lower end into a steam-drum, G. Concentricallywithin the coil F is the coil H of the heater, the induction-pipe ofsuch coil\ H being shown at I. The coil H terminates at its upper end inahorizontal pipe,K,wl1ich crosses the vertical axis of the generator andextends through its casing B in manner as represented. WVhere or aboutwhere the said pipe K intersects the said axis there is in the lowerpart of the pipe one or more holes, a. In practice I have in the pipeaclearer, which is shown in part at b, its office being to clear thehole of any carbonaceous deposit that may gather within the pipe in amanner to obstruct the outlet a. I

L and M are pipes extending from the steamdrum G, and furnished withwaste-cocks c c.

45 The pipe N is the educt for the discharge of steam from the drum,condensed steam or water being extracted from the drum through. the pipeM. The case B is provided at top with a chimney or discharge-flue, B,and is 5o surrounded by a duplex air-jacket composed in part of twoconcentric casings, O and P, erected on the base S of the case B, andarranged as represented. The casing 0 does not extend up to the top T ofthe air-jacket. The

air for promoting combustion of the gas gen erated within and dischargedfrom the heater enters the jacket through holes in the lower part of it,(shown at d (1,) and after circulating within the said jacket escapestherefrom through holes 6 e, &c., in the case B. 6

WVithin the coil H isadeflector, U, upon the top of which, when thegenerator is in operation, a jet of flame strikes, and by which it isdeflected in radial and other directions upon the coil H, the said jetbeing produced by gas issuing from the opening a and afterward inflamed.

In the operation of this steam-generator oil or liquid petroleum orother proper hydrocarbon is to be supplied to the coil H from a suitiblereservoir or means and by the induct I. After passing through the coil,the combustible liquid is to be inflamed at its point of exit a, or asit may drop upon the deflector. The flame produced willsoon intenselyheat the coil H and convert into gas the liquid received therein, which,under great tension will escape at the hole a, and, mixing with the airentering the case B through the holes 6, will heat the pipe A, the coilsE and 13:, and the drums D and G, and convert into steam the waterflowing through the coil E, and superheat such steam while it may bepassing through the coil F and from thence into the drum G.

In practice a steam boiler or generator thus made has been found tooperate to very great advantage and very economically. If desirable, anauxiliary steam-drum may be placed within the upper part of the case Band connected with the drum G by a pipe. So should it be desirable tohave between the coils E and F one or more coils like those marked 0 andE, and one or more drums like the drum D, all being properly connectedwith each other and the coils E and F, so that steam may pass from thecoil E through such additions to and Iii t0 the coil. F, such may beadapted as useful auxiliaries to my invention. r

Within the upper part of the generator, and Ice extending across it, isa chamber,VV, having a series of pipes, X, going through it from top tobottom of it. Thesepipes are open at their ends,in order for the smokeand gaseous products of combustion to pass off through them into thespace Y,between them andthe flue or pipe R. A pipe, Z, provided with adamper, A, is to supply the chamber W with air. Out of the said chamberpipes B extend into the air-jacket. The air flowing through the chamberW into the air-jacket will be heated by the pipes X, and consequently,by means of the chamber WV and its pipes X, Z, and B, heat which wouldotherwise be lost may be utilized in heating the air necessary forcombustion.

I claim- 1. The combination of the drumsrD and G and the coils G, E, andF, the coil 0 being within the coil E and around the drum D,and the coilF above the drum G, as described, with the heater composed of the pipesI and K, the coil H,and the deflector U, arranged with and within thecoil F, as represented, the pipe K of such heater being provided withone or more jet-holes, a, as explained.

2. The combination of the case B, provided with one or more air-inducts,6, with the drums D and G, coils O, E, and F, the coil O'being withinthe coil E and around the drum D, and the coil F above the drum G andthe heater, as described, consisting of the pipes I and K, coil H, anddeflector U, coil H and deflector U being within the coil F, all beingadapted substantially as described, and the coil 0 furnished with aninduct,A,for supplying it with water. i

3. The combination of the air-heating chamber W, provided with the pipesX and Z, and with conduits leading from it into the airjacket, asdescribed, with such jacket, the case B, and the heater, the coils anddrums arranged within such case, and adapted substan tially and tooperate as set forth.

v DANIEL MCBRIDE GRAHAM.

Witnesses:

B. H. EDDY, E. B. PRATT.

